Home / 21,155.54-29,186.81-13,606.04

Finding the Fourth Proportional to 21,155.54, 29,186.81 and 13,606.04

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Solution

The fourth proportional to 21,155.54, 29,186.81 and 13,606.04 is: 18,771.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.54 : 29,186.81 = 13,606.04 : x
  2. Step 2: Convert to fraction form
    21,155.54/29,186.81 = 13,606.04/x
  3. Step 3: Cross multiply
    21,155.54x = 29,186.81 × 13,606.04
  4. Step 4: Simplify right side
    21,155.54x = 397,116,690.37
  5. Step 5: Solve for x
    x = 397,116,690.37/21,155.54
  6. Step 6: Final answer
    x = 18,771.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.